Some have more dollars than sense, they say, so even companies that have no revenue, no profit, and a record of falling short, can easily find investors. And in their study titled Who Falls Prey to the Wolf of Wall Street?' Leuz et. al. found that it is 'quite common' for investors to lose money by buying into 'pump and dump' schemes.

In the age of tech-stock blue-sky investing, my choice may seem old fashioned; I still prefer profitable companies like Spirax-Sarco Engineering (LON:SPX). Even if the shares are fully valued today, most capitalists would recognize its profits as the demonstration of steady value generation. Conversely, a loss-making company is yet to prove itself with profit, and eventually the sweet milk of external capital may run sour.

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Spirax-Sarco Engineering's Earnings Per Share Are Growing.

If you believe that markets are even vaguely efficient, then over the long term you'd expect a company's share price to follow its earnings per share (EPS). That means EPS growth is considered a real positive by most successful long-term investors. As a tree reaches steadily for the sky, Spirax-Sarco Engineering's EPS has grown 33% each year, compound, over three years. As a general rule, we'd say that if a company can keep up that sort of growth, shareholders will be smiling.

I like to see top-line growth as an indication that growth is sustainable, and I look for a high earnings before interest and taxation (EBIT) margin to point to a competitive moat (though some companies with low margins also have moats). Spirax-Sarco Engineering shareholders can take confidence from the fact that EBIT margins are up from 22% to 26%, and revenue is growing. That's great to see, on both counts.

In the chart below, you can see how the company has grown earnings, and revenue, over time. To see the actual numbers, click on the chart.

Are Spirax-Sarco Engineering Insiders Aligned With All Shareholders?

Like the kids in the streets standing up for their beliefs, insider share purchases give me reason to believe in a brighter future. That's because insider buying often indicates that those closest to the company have confidence that the share price will perform well. However, small purchases are not always indicative of conviction, and insiders don't always get it right.

It's good to see Spirax-Sarco Engineering insiders walking the walk, by spending UK£259k on shares in just twelve months. When you contrast that with the complete lack of sales, it's easy for shareholders to brim with joyful expectancy. It is also worth noting that it was Chairman of the Board James Robert Pike who made the biggest single purchase, worth UK£200k, paying UK£70.02 per share.

The good news, alongside the insider buying, for Spirax-Sarco Engineering bulls is that insiders (collectively) have a meaningful investment in the stock. Indeed, they hold UK£9.9m worth of its stock. That shows significant buy-in, and may indicate conviction in the business strategy. Even though that's only about 0.2% of the company, it's enough money to indicate alignment between the leaders of the business and ordinary shareholders.

While insiders are apparently happy to hold and accumulate shares, that is just part of the pretty picture. The cherry on top is that the CEO, Nick Anderson is paid comparatively modestly to CEOs at similar sized companies. I discovered that the median total compensation for the CEOs of companies like Spirax-Sarco Engineering with market caps between UK£3.1b and UK£9.3b is about UK£2.5m.

The Spirax-Sarco Engineering CEO received UK£2.2m in compensation for the year ending December 2017. That comes in below the average for similar sized companies, and seems pretty reasonable to me. CEO compensation is hardly the most important aspect of a company to consider, but when its reasonable that does give me a little more confidence that leadership are looking out for shareholder interests. It can also be a sign of a culture of integrity, in a broader sense.

Does Spirax-Sarco Engineering Deserve A Spot On Your Watchlist?

For growth investors like me, Spirax-Sarco Engineering's raw rate of earnings growth is a beacon in the night. Not only that, but we can see that insiders both own a lot of, and are buying more, shares in the company. So it's fair to say I think this stock may well deserve a spot on your watchlist. Of course, just because Spirax-Sarco Engineering is growing does not mean it is undervalued. If you're wondering about the valuation, check out this gauge of its price-to-earnings ratio, as compared to its industry.

As a growth investor I do like to see insider buying. But Spirax-Sarco Engineering isn't the only one. You can see a a free list of them here.

Please note the insider transactions discussed in this article refer to reportable transactions in the relevant jurisdiction

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned. Thank you for reading.